How to invest money ( illustrated) The purpose of this book is to present in a clear form the simple principles of investment and to give the reader a practical knowledge of the different categories of securities that are available as investments and their adaptability relative to different needs. The book is an outgrowth of the writer's personal experience as an investment banker. Much of the material that is presented appeared in the pages of &#x22;System&#x22; Magazine, by the courtesy of which the editors are now rearranged and consolidated for publication in book form.